Answer :B. They are used to reduce molecular oxygen to water in the electron transport chain.
Explanation:
<u>oxygen is the final electron acceptor in the electron transport chain(ETC) of cellular respiration.</u>
If electrons were not accepted by oxygen, the concentration gradients which drives Co-enzymes NADH and FADH2 from the citric acid cycle to the matrix of mitochondrial for ETC will seize; proton pumps across the mitochondrial intramembranes will not exist.
<u>Therefore no proton gradient for ATPase synthase to synthesise ATP from ADP. Thus no ETC</u>
conclusively, oxygen must be reduced by the electron.
Note:
option D; is near to the correct option, but it is wrong because, it is the energy supplied by the proton gradient that drives the phosphorylation of ADP to ATP, not the electron.The electron only provided the potential energy for the pumping of the protons, but not for the direct phosphorylation
Is it something to do with the pressure of the air, higher up it has more air pressure making it cooler? I don’t really know but it’s an educated guess
sugars are transported through the phloem, from sources to sinks, is called pressure flow. At the sources (usually the leaves), sugar molecules are moved into the sieve elements (phloem cells) through active transport.
Hypotonic solution means a solution with a higher water potential than the cell
isotonic is the solution with the same amount of water potential with the cell
in animal cell, it only has a semi permeable membrane, therefore when put in hypotonic solution, water molecules will move from the solution to inside the cell by osmosis. the cell may gain so much water that it may burst
in isotonic solution, the net movement of water molecules will be same in each direction , as the water potential is same. that way the cell will not gain or loss water and remain it oiriginals shape
however in plant cells, it has a cell wall. it prevents the cell from bursting. so when put in hypotonic, the cell gain water,but not burst, the cell membrane just push against the cell wall and the cell become turgid
in isotonic solution, same animal cell , no change
Answer:
The correct answer is C in presence of oxygen production of acetyl CoA,TCA cycle and electron transport chain occur in a proper order.Whether in absence of oxygen lactic acid fermentation or alcoholic fermentation occurs.
Explanation:
Aerobic respiration occur in presence of oxygen which involves glycolysis,TCA cycle and electron transport chain.Aerobic respiration result in the catabolism of glucose to generate CO2,H2O and ATP.
But in absence of oxygen or during anaerobic condition pyruvic acid is converted to either lactic acid by pyruvate dehydrogenase or to ethanol through alcoholic fermentation.
